Cisco Systems’ new ASR-9000 edge router promises faster delivery of all that rich Internet media destined for personal computers and mobile devices. The $80,000 question for potential customers: Will it prove to be too rich during challenging economic times? The company’s new piece of telecommunications equipment — introduced Tuesday after four years and $200 million in the making — comes with a promise and a prediction. Cisco says it will give customers like cable and mobile phone companies and Internet service providers six times the capacity of products from competitors.